591
WWUS45 KBYZ 120910
WSWBYZ
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE BILLINGS MT
210 AM MST FRI DEC 12 2025
MTZ030>032-130915-
/O.CON.KBYZ.WS.W.0019.251212T1200Z-251213T1500Z/
/O.CON.KBYZ.WW.Y.0041.000000T0000Z-251212T1200Z/
TREASURE-NORTHERN ROSEBUD-CUSTER-
INCLUDING THE LOCATIONS OF HYSHAM, ISMAY, MILES CITY, BIGHORN,
ANGELA, FORSYTH, VOLBORG, COLSTRIP, AND INGOMAR
210 AM MST FRI DEC 12 2025
...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM EARLY THIS
MORNING TO 8 AM MST SATURDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST EARLY
THIS MORNING...
* WHAT...FOR THE WINTER WEATHER ADVISORY, SNOW OCCURRING. ADDITIONAL
SNOW ACCUMULATIONS UP TO ONE INCH. FOR THE WINTER STORM WARNING,
HEAVY SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 4 AND 8
INCHES.
* WHERE...TREASURE, CUSTER, AND NORTHERN ROSEBUD.
* WHEN...FOR THE WINTER WEATHER ADVISORY, UNTIL 5 AM MST EARLY THIS
MORNING. FOR THE WINTER STORM WARNING, FROM 5 AM EARLY THIS MORNING
TO 8 AM MST SATURDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. THE HAZARDOUS CONDITIONS
WILL IMPACT THE FRIDAY MORNING AND EVENING COMMUTES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN YOUR
VEHICLE IN CASE OF AN EMERGENCY. FOR THE LATEST ROAD CONDITIONS, CALL
5 1 1.
MTZ029-042-063-173-228-130600-
/O.CON.KBYZ.WS.W.0019.000000T0000Z-251213T0600Z/
MUSSELSHELL-GOLDEN VALLEY-JUDITH GAP-NORTHEASTERN YELLOWSTONE-
SOUTHERN WHEATLAND-
INCLUDING THE LOCATIONS OF TWODOT, MUSSELSHELL, CUSTER, SHAWMUT,
ROUNDUP, RYEGATE, JUDITH GAP, POMPEYS PILLAR, MELSTONE, LAVINA, AND
HARLOWTON
210 AM MST FRI DEC 12 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...
* WHAT...HEAVY SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS BETWEEN
4 AND 7 INCHES. WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...GOLDEN VALLEY, JUDITH GAP, MUSSELSHELL, SOUTHERN WHEATLAND,
AND NORTHEASTERN YELLOWSTONE.
* WHEN...UNTIL 11 PM MST THIS EVENING.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. THE HAZARDOUS CONDITIONS
WILL IMPACT THE FRIDAY MORNING AND EVENING COMMUTES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN YOUR
VEHICLE IN CASE OF AN EMERGENCY. FOR THE LATEST ROAD CONDITIONS, CALL
5 1 1.
MTZ034-057-058-138-141-172-235-130300-
/O.CON.KBYZ.WS.W.0019.000000T0000Z-251213T0300Z/
NORTHERN STILLWATER-NORTHERN BIG HORN-SOUTHERN ROSEBUD-SOUTHERN
BIG HORN-NORTHERN SWEET GRASS-MELVILLE FOOTHILLS-SOUTHWESTERN
YELLOWSTONE-
INCLUDING THE LOCATIONS OF WYOLA, PARK CITY, PRYOR, ABSAROKEE,
LAUREL, BIRNEY, MELVILLE, BUSBY, REED POINT, LAME DEER, ASHLAND, CROW
AGENCY, COLUMBUS, HARDIN, LODGE GRASS, BIG TIMBER, BROADVIEW,
BILLINGS, RAPELJE, AND HUNTLEY
210 AM MST FRI DEC 12 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...
* WHAT...HEAVY SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS BETWEEN
3 AND 6 INCHES.
* WHERE...PORTIONS OF SOUTH CENTRAL AND SOUTHEAST MONTANA.
* WHEN...UNTIL 8 PM MST THIS EVENING.
* IMPACTS...TRAVEL WILL BE VERY DIFFICULT WITH SLICK AND SNOW COVERED
ROADS, AND AREAS OF POOR VISIBILITY. THE HAZARDOUS CONDITIONS WILL
IMPACT THE FRIDAY MORNING AND EVENING COMMUTES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN YOUR
VEHICLE IN CASE OF AN EMERGENCY. FOR THE LATEST ROAD CONDITIONS, CALL
5 1 1.
MTZ068-130300-
/O.CON.KBYZ.WS.W.0019.000000T0000Z-251213T0300Z/
CRAZY MOUNTAINS-
210 AM MST FRI DEC 12 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...
* WHAT...HEAVY SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS BETWEEN
8 AND 16 INCHES. WINDS GUSTING AS HIGH AS 45 MPH.
* WHERE...CRAZY MOUNTAINS.
* WHEN...UNTIL 8 PM MST THIS EVENING.
* IMPACTS...RECREATION IN THE HIGH COUNTRY WILL BE IMPACTED BY HEAVY
ACCUMULATING SNOW AND BLOWING SNOW.
* ADDITIONAL DETAILS...AVALANCHE DANGER MAY INCREASE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE PREPARED FOR WINTRY CONDITIONS IF YOU HAVE PLANS IN THE
BACKCOUNTRY.
MTZ033-036-037-130915-
/O.CON.KBYZ.WW.Y.0041.000000T0000Z-251213T1500Z/
FALLON-POWDER RIVER-CARTER-
INCLUDING THE LOCATIONS OF BAKER, WEBSTER, BROADUS, BIDDLE, EKALAKA,
ALZADA, BELLTOWER, SONNETTE, PLEVNA, HAMMOND, AND POWDERVILLE
210 AM MST FRI DEC 12 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST
SATURDAY...
* WHAT...SNOW EXPECTED. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 2 AND 6
INCHES.
* WHERE...CARTER, FALLON, AND POWDER RIVER.
* WHEN...UNTIL 8 AM MST SATURDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. THE HAZARDOUS CONDITIONS
WILL IMPACT THE FRIDAY MORNING AND EVENING COMMUTES.
* ADDITIONAL DETAILS...LOWER SNOWFALL TOTALS WILL OCCUR IN POWDER
RIVER AND CARTER COUNTIES WITH HIGHER AMOUNTS IN FALLON COUNTY.
SNOWFALL IN PARTS OF FALLON COUNTY MAY EXCEED 6 INCHES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. FOR THE LATEST ROAD
CONDITIONS, CALL 5 1 1.
MTZ040-065-121600-
/O.CON.KBYZ.WW.Y.0041.000000T0000Z-251212T1600Z/
NORTHERN PARK-LIVINGSTON AREA-
INCLUDING THE LOCATIONS OF WILSALL, CLYDE PARK, SPRINGDALE, AND
LIVINGSTON
210 AM MST FRI DEC 12 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MST THIS
MORNING...
* WHAT...MIXED PRECIPITATION OCCURRING INCLUDING FREEZING RAIN.
ADDITIONAL SNOW ACCUMULATIONS UP TO TWO INCHES AND ICE
ACCUMULATIONS FROM A LIGHT GLAZE TO 0.05 INCHES.
* WHERE...LIVINGSTON AREA AND NORTHERN PARK.
* WHEN...UNTIL 9 AM MST THIS MORNING.
* IMPACTS...PLAN ON SLICK ROAD CONDITIONS. THE HAZARDOUS CONDITIONS
WILL IMPACT THE FRIDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. FOR THE LATEST ROAD
CONDITIONS, CALL 5 1 1.
MTZ056-066-139-121600-
/O.CON.KBYZ.WW.Y.0041.000000T0000Z-251212T1600Z/
RED LODGE FOOTHILLS-BEARTOOTH FOOTHILLS-SOUTHEASTERN CARBON-
INCLUDING THE LOCATIONS OF BELFRY, ROSCOE, MCLEOD, BRIDGER, WARREN,
ROBERTS, FISHTAIL, NYE, AND RED LODGE
210 AM MST FRI DEC 12 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MST THIS
MORNING...
* WHAT...SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS UP TO TWO
INCHES.
* WHERE...BEARTOOTH FOOTHILLS, RED LODGE FOOTHILLS, AND SOUTHEASTERN
CARBON.
* WHEN...UNTIL 9 AM MST THIS MORNING.
* IMPACTS...ROADS, AND ESPECIALLY BRIDGES AND OVERPASSES, WILL LIKELY
BECOME SLICK AND HAZARDOUS. THE HAZARDOUS CONDITIONS WILL IMPACT
THE FRIDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. FOR THE LATEST ROAD
CONDITIONS, CALL 5 1 1.
MTZ169-170-WYZ199-121900-
/O.CON.KBYZ.WW.Y.0041.000000T0000Z-251212T1900Z/
BIGHORN CANYON-NORTHERN CARBON-SHERIDAN FOOTHILLS-
INCLUDING THE LOCATIONS OF JOLIET, DAYTON, CLEARMONT, FORT SMITH,
RANCHESTER, BIG HORN, FROMBERG, AND SHERIDAN
210 AM MST FRI DEC 12 2025
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY
* WHAT...SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS UP TO THREE
INCHES.
* WHERE...IN MONTANA, BIGHORN CANYON AND NORTHERN CARBON. IN WYOMING,
SHERIDAN FOOTHILLS.
* WHEN...UNTIL NOON MST TODAY.
* IMPACTS...PLAN ON SLICK ROAD CONDITIONS. THE HAZARDOUS CONDITIONS
WILL IMPACT THE FRIDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. FOR THE LATEST ROAD
CONDITIONS, CALL 5 1 1.
MTZ171-WYZ198-121900-
/O.CON.KBYZ.WW.Y.0041.000000T0000Z-251212T1900Z/
PRYOR/NORTHERN BIGHORN MOUNTAINS-NORTHEAST BIGHORN MOUNTAINS-
INCLUDING THE LOCATIONS OF BURGESS JCT AND STORY
210 AM MST FRI DEC 12 2025
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY
* WHAT...SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS UP TO 3
INCHES.
* WHERE...IN MONTANA, PRYOR/NORTHERN BIGHORN MOUNTAINS. IN WYOMING,
NORTHEAST BIGHORN MOUNTAINS.
* WHEN...UNTIL NOON MST TODAY.
* IMPACTS...PLAN ON SLICK ROAD CONDITIONS. THE HAZARDOUS CONDITIONS
WILL IMPACT THE FRIDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. FOR THE LATEST ROAD
CONDITIONS, CALL 5 1 1.
ADDITIONAL GRAPHICS FOR THIS HAZARD CAN BE FOUND AT
HTTP://WWW.WEATHER.GOV/BILLINGS
TORGERSON
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